DVD Stands for Digital Versatile Disc, although some incorrectly pronounce it as Digital Video Disc.
The Standard DVD Format allows for Two Sides, each with 2 Layers.
One Layer, One Side: 4.7GB
Two Layers, One Side: 8.5GB
One Layer, Two Sides: 9.4GB
Two Layers, Two Sides: 17GB
Dual-Layer Capacity it reaching the end of the line, as longer, and more detailed movies hit the shelves. Answering to this, two competing standards have emerged to succeed DVD. HD-DVD and Blu-ray are currently vying for Market Dominance.